Cisco Talos Blog

April 25, 2023 13:16

Video: Everything you need to know about ongoing state-sponsored attacks targeting network infrastructure across the globe

Video explanation of the Jaguar Tooth vulnerabilities with Matt Olney, J.J. Cummings and Hazel Burton.

April 18, 2023 11:02

State-sponsored campaigns target global network infrastructure

This campaign, dubbed "Jaguar Tooth," is an example of a much broader trend of sophisticated adversaries targeting networking infrastructure to advance espionage objectives or pre-position for future destructive activity.

March 30, 2023 18:29

Threat Advisory: 3CX Softphone Supply Chain Compromise

This is just the latest supply chain attack threatening users, after the SolarWinds incident in 2020 and the REvil ransomware group exploiting Kaseya VSA in 2021.

March 22, 2023 15:41

Emotet resumes spam operations, switches to OneNote

Since returning, Emotet has leveraged several distinct infection chains, indicating that they are modifying their approach based on their perceived success in infecting new systems.

March 15, 2023 19:46

Threat Advisory: Microsoft Outlook privilege escalation vulnerability being exploited in the wild

Cisco Talos is urging all users to update Microsoft Outlook after the discovery of a critical vulnerability, CVE-2023-23397, in the email client that attackers are actively exploiting in the wild.

December 13, 2022 15:30

HTML smugglers turn to SVG images

* HTML smuggling is a technique attackers use to hide an encoded malicious script within an HTML email attachment or webpage. * Once a victim receives the email and opens the attachment, their browser decodes and runs the script, which then assembles a malicious payload directl

December 8, 2022 14:38

Breaking the silence - Recent Truebot activity

Since August 2022, we have seen an increase in infections of Truebot (aka Silence.Downloader) malware. Truebot was first identified in 2017 and researchers have linked it to a threat actor called Silence Group that is responsible for several high-impact attacks on financial insti

November 17, 2022 08:01

Get a Loda This: LodaRAT meets new friends

* LodaRAT samples were deployed alongside other malware families, including RedLine and Neshta. * Cisco Talos identified several variants and altered versions of LodaRAT with updated functionality have been seen in the wild. * Changes in these LodaRAT variants include new f

November 1, 2022 15:03

Threat Advisory: High Severity OpenSSL Vulnerabilities

In late October two new buffer overflow vulnerabilities, CVE-2022-3602 and CVE-2022-3786, were announced in OpenSSL versions 3.0.0 to 3.0.6. These vulnerabilities can be exploited by sending an X.509 certificate with a specially crafted email address, potentially causing a buffer